Hi - If you don't have any other discs, go to the link below and download and run this free program. It wil display a report of your system. Print it if you can, it provides a lot of useful information.
Under the heading 'Display' what are the details. Regards.

I'm going to assume that Galena was referring to www.belarc.com (click the free download link at the top of page)

Once you know what display adapter (graphics card ) you have, you should be able to download the correct driver from the card manufactuer or from www.driverguide.com For 98, your best bet will probably be the driver guide site. The driver will probably be downloaded as a zip file, you will need to unzip to a location you can find (desktop is good). Exactly how you install the new driver will vary, so I won't go into it just yet to avoid confusion. Charlie